DIN EN 10314-2016 Method for the derivation of minimum values of proof strength of steel at elevated temperatures German version EN 10314 2016《高温下验证钢强度最小值导出法 德文版本EN 10314-2016》.pdf

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1、October 2016 English price group 9No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 77.140.30!%n“2577558www.din.deDIN

2、 EN 10314Method for the derivation of minimum values of proof strength of steel at elevated temperatures;English version EN 10314:2016,English translation of DIN EN 10314:2016-10Verfahren zur Ableitung von Mindestwerten der Dehngrenze von Stahl bei erhhten Temperaturen;Englische Fassung EN 10314:201

3、6,Englische bersetzung von DIN EN 10314:2016-10Mthode de drivation des valeurs minimales de la limite conventionnelle dlasticit des aciers tempratures leves;Version anglaise EN 10314:2016,Traduction anglaise de DIN EN 10314:2016-10SupersedesDIN EN 10314:200302www.beuth.deDTranslation by DIN-Sprachen

4、dienst.In case of doubt, the German-language original shall be considered authoritative.Document comprises 13 pages 09.16 2A comma is used as the decimal marker. National foreword This document (EN 10314:2016) has been prepared by Technical Committee ECISS/TC 107 “Steels for pressure purposes” (Secr

5、etariat: DIN, Germany). The responsible German body involved in its preparation was DIN-Normenausschuss Eisen und Stahl (DIN Standards Committee Iron and Steel), Subcommittee 04/2 Sthle fr den Druckbehlterbau. Amendments This standard differs from DIN EN 10314:2002 as follows: a) the Foreword has be

6、en revised to update references; b) normative references have been updated; c) the definition for fav(t)has been revised; d) details regarding the ratio values f(t)have been revised; e) the reference given in Subclause 5.1.3 for the location of the test piece has been amended; f) the last paragraph

7、in Subclause 5.3, a) has been deleted; g) a new Subclause 5.4 has been introduced; h) footnote 2) to Subclause 6.2 has been corrected; i) the standard has been editorially revised. Previous editions DIN EN 10314: 1999-10, 2003-02 DIN V ENV 22605-1: 1991-12 DIN V ENV 22605-2: 1991-12 DIN V ENV 22605-

8、3: 1991-12 DIN EN 10314:2016-10EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10314 June 2016 ICS 77.140.30 Supersedes EN 10314:2002English Version Method for the derivation of minimum values of proof strength of steel at elevated temperatures Mthode de drivation des valeurs minimales de la li

9、mite conventionnelle dlasticit des aciers tempratures leves Verfahren zur Ableitung von Mindestwerten der Dehngrenze von Stahl bei erhhten Temperaturen This European Standard was approved by CEN on 18 March 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipula

10、te the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Sta

11、ndard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the na

12、tional standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, S

13、lovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any me

14、ans reserved worldwide for CEN national Members. Ref. No. EN 10314:2016 EEN 10314:2016 (E) 2 Contents Page European foreword 3 Introduction 4 1 Scope 5 2 Normative references 5 3 Terms and definitions . 5 4 Symbols and abbreviations . 5 5 Method 6 5.1 Input data groups 6 5.2 Ratio values . 6 5.3 Min

15、imum proof strength values 6 5.4 Minimum yield strength values . 7 6 Application of the method . 7 6.1 Representative data groups 7 6.2 Number of data 8 6.3 Consistency of data . 8 6.4 Result . 8 Annex A (informative) Significant changes to the previous version EN 10314:2002 . 10 Bibliography 11 DIN

16、 EN 10314:2016-10EN 10314:2016 (E) 3 European foreword This document (EN 10314:2016) has been prepared by Technical Committee ECISS/TC 107 “Steels for pressure purposes”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publi

17、cation of an identical text or by endorsement, at the latest by December 2016, and conflicting national standards shall be withdrawn at the latest by December 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELE

18、C shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 10314:2002. Regarding the most significant technical changes that have been made in this new edition of EN 10314, see Annex A. According to the CEN/CENELEC Internal Regulations, the national st

19、andards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

20、 Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 10314:2016-10EN 10314:2016 (E) 4 Introduction Minimum values for tensile properties are specified in European Standards for steels and other metal

21、s for elevated temperature service. Such values are used to determine design strength values particularly where the materials are used in pressure systems. Two International Standards, ISO 2605-1 and ISO 2605-2 (meanwhile withdrawn) were adopted by CEN as European Prestandards, ENV 22605-1 and ENV 2

22、2605-2. They set out procedures, based on statistical assessments of bodies of data, for the derivation and verification of minimum values of 0,2 % proof strength at elevated temperatures. These procedures determine the minimum values from lower confidence lines. A third International Standard, ISO

23、2605-3, adopted by CEN as ENV 22605-3, sets out procedures for determining minimum values from the average trend behaviour of the property of interest as a function of temperature. One of the purposes of the procedures in ISO 2605-1 and ISO 2605-2 (ENV 22605-1 and ENV 22605-2) is to give an alternat

24、ive to the requirement for elevated temperature tensile acceptance tests on individual products by organizations and manufacturers contributing data for assessment and as a result of this to reduce the test frequency. Experience has shown that the procedures in ISO 2605-1 and ISO 2605-2 (ENV 22605-1

25、 and ENV 22605-2) have limitations affecting the relationship between derived minimum property values and the minima of the test data arising from the statistical and some subjective decisions at various stages of the procedures. They also require relatively large amounts of data to produce an accep

26、table level of accuracy. The procedure set out in ISO 2605-3 (ENV 22605-3) requires less data but because it is designed to always give conservative values from few data can give non-representative results. However, the principle of this procedure is considered to be more realistic and is adopted as

27、 the basis of this European Standard; the objective is to produce an assessment procedure for tensile property data which is simple to operate, gives representative results and is usable in computerized form. This European Standard, which supersedes EN 10314:2002, which in turn superseded ENV 22605-

28、1, 2 and 3, sets out a method for deriving minimum proof strength values for steels at elevated temperatures with the intention that such values are specified in relevant product standards. This European Standard does not specify a frequency of testing for the product standards where EN 10314 is app

29、lied. Verification of tensile properties at elevated temperatures is normally specified in the relevant product standard using the minimum property values derived by the procedure established in this European Standard. The method has been tested for proof strength values of steel. However, it is con

30、sidered that the method can also be applied for the derivation of minimum values of tensile strength at elevated temperatures. DIN EN 10314:2016-10EN 10314:2016 (E) 5 1 Scope This European Standard specifies a method for deriving the minimum proof strength values for steels at elevated temperatures.

31、 However, this European Standard does not specify a verification procedure. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated re

32、ferences, the latest edition of the referenced document (including any amendments) applies. EN ISO 6892-1, Metallic materials Tensile testing Part 1: Method of test at room temperature (ISO 6892-1) EN ISO 6892-2, Metallic materials Tensile testing Part 2: Method of test at elevated temperature (ISO

33、6892-2) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 data set property value data from room and elevated temperatures from the product selected for testing Note 1 to entry: This data can include averaged values where more than one set of t

34、ests at a given temperature representing one location is carried out. 3.2 data group property value data from X data sets as used for each assessment 3.3 result set ratio values for each data set 4 Symbols and abbreviations For the purposes of this document, the following symbols apply. t elevated t

35、emperature in C; f(t)ratio value; property value at elevated temperature t (in C) divided by property value at room temperature; fav(t)the f(t)- value resulting from the trend curve for a specified temperature; Reyield strength (in MPa1); Rpproof strength (in MPa1); 1) 1 MPa = 1 N/mm. DIN EN 10314:2

36、016-10EN 10314:2016 (E) 6 Rp(t)/Rp(20)ratio value; proof strength at elevated temperature t divided by proof strength value at room temperature (20 C); srresidual scatter. 5 Method 5.1 Input data groups 5.1.1 For a given steel grade, input data, to form a data group, shall be established by tensile

37、tests at: a) room temperature in accordance with EN ISO 6892-1; b) elevated temperature in accordance with EN ISO 6892-2. 5.1.2 The data shall be identified by reference to a product standard and a steel grade (steel name and/or steel number as appropriate). Where input data predates the publication

38、 of the European Standards detailed in 5.1.1 a) and 5.1.1 b) the sampling and tensile testing shall have been carried out in accordance with the relevant product standard. 5.1.3 Test pieces for tensile tests both at room and elevated temperatures shall be taken from the same product. The location of

39、 the test piece shall be in accordance with the relevant product standard. Test pieces shall be taken as close to each other as possible. 5.1.4 Input data shall clearly identify the test method used and all data within each set (see definitions) shall have been determined by the same method. 5.2 Rat

40、io values Property values resulting from the tensile tests at elevated temperature in accordance with 5.1 are normalized by expressing each value as a ratio f(t)of the equivalent property value at room temperature obtained in accordance with Subclause 5.1: ( )=tproperty value at elevated temperature

41、 in Cfproperty value at room temerature in CThe ratio values f(t)obtained for each data set constitute a result set. Each result set is plotted as a function of temperature and the value fav(t)at each temperature is determined from a trend curve which passes through a ratio value of 1,0 at room temp

42、erature, see Figure 1. The trend curve should be determined by a recognized procedure, normally a polynomial curve with degree 1-4, using a recognized statistical procedure such as a “least squares” technique. Before fitting the trend curve the data shall be examined to determine whether it forms mo

43、re than one population; where that is the case the data shall be examined in detail with respect to its pedigree (see 6.2) and where deemed necessary treated separately (see also 6.1 and 6.3). 5.3 Minimum proof strength values From the trend curve established and average ratio values fav(t)derived i

44、n accordance with 5.2, the minimum proof strength values Rp(t)min(where appropriate Remay be used instead of Rp) are determined by alternative application of one of the following procedures, depending on the lowest value of fav(t)achieved over the temperature range for which minimum proof strength v

45、alues are required: DIN EN 10314:2016-10EN 10314:2016 (E) 7 a) When fav(t) 0,4 within the range of temperature values of interest: ( ) ( ) ( )( )= 201,1 0,1p t min p min av tRR f NOTE 1 In deriving the formula a linear relationship has been anticipated between Rp(t)and Rp(20)at a given temperature t

46、 where the average ratio value fav(t)is the slope of the regression line which passes through the zero point, and where the standard deviation of the residual scatter sris set equal to 0,05 Rp(20)min. For the purpose of this standard the specified minimum proof strength value Rp(t)min at a given tem

47、perature t is defined as the proof strength value derived from the lower ( 2s) confidence level value for proof strength at a room temperature which is 0,1 Rp(20)minhigher than the specified minimum proof strength value at room temperature. In terms of probability the minimum proof strength value Rp

48、(t)minapproximately represents the value of Rp(t)on the 2s confidence level of a virtual data set the lowest room temperature proof strength value of which is equal to Rp(20)min. b) When fav(t) 0,4 within the range of temperature values of interest: 1) for 20 C t 250 C ( ) ( ) ( )( )= 200,05 20230p

49、t min p min av ttRR f 2) for t 250 C ( ) ( ) ( )( )= 20 0,05p t min p min av tRR f NOTE 2 At those temperatures where fav(t) 0,4, method 5.3 b) would provide lower Rp(t)values than method 5.3 a). 5.4 Minimum yield strength values If only minimum yield strength values at room temperature are defined, and minimum proof strength values at higher temperatures should be derived, the formulae in Subclause 5.3 apply under con